Effect of melting on dynamic combustion behavior of energetic materials

The effect of melting on the intrinsic stability of steady-state combustion of energetic materials has been analytically studied using the Zeldovich-N ovozhilov approach. Stability limits are given in conventional and modified sensitivity parameters coordinates. Their dependence on the melting heat a nd temperature is explained in a simple way. Numerical calculations based o n an original mathematical model were performed to verify the effects of me lting on the stability of pressure-driven combustion regimes. Qualitatively , the effect of melting heat on the stability of transient combustion regim es with developed gas phase reactions is the same as that on the stability of steady-state regime, that is, as the melting heat increases, the stabili ty decreases. In addition, the effect of melting temperature on the burning rate response to harmonic pressure oscillations has been numerically studi ed. The effect appears to be qualitatively the same under stationary and tr ansient regimes, that is, as the melting temperature increases and approach es the temperature of the burning surface, the response function decreases noticeably in its absolute value, which corresponds to an increase of combu stion stability.